Tubular rock-boring drill.



No. 817.296. A PATfiN'TED APR. 10, 1906. W. BESSON.

TUBULAR ROCK BORING DRILL.

APPLICATION FILED MAB.. S1. 1905.

. a V V1 8 a x 'VW a If 8 Z 5 4, 3 4 2 r a & 7 2 3 f FU g Z a@ 1/3 4 JY; 7B

a V i 4 3:7' 2

l' f .4 -1 .w :1

Jl &nuw- Y @F 'I IIE 4+ M ulu 5-; 6 I

a i I 1 [V/TNESS/?S- Awwzvmk.

4 A Malam & Qt j W 51d0 mm I A 771mm; Y.

UNITED s ir-;Mns

QPATENT onn? &tpeeiiicatien of Letters Patent j i'atentecl April 1G, 19d6).

Application filed March 31.1906. SerialJ'No. 263.037.

"T all whom it may concern.-

Be it known that I, VVIUZIAM Brunson, a citizen of the United States, residiin at Duluth, in the county of St. .Louis and State of Minnesota, have invented certain net r and nseful improvements in Tubular Rock-Boring Drills; and I do hereby declare the to .be a full, clear, and exact de., ription 'of the invention, such Will enable others skilled in the art to Which it appertains to make and use the same.

'My invention relates to tubular I'OCli bOI'- ing drills, and particularly to rotating drills adapted to cut a core from the rock.`

It has for its object the provision oi a bit adapted to communicate With a reservoir located' near the bottom ozl? said drill and ada ted to contain loose or' flowing abrasiyes.

ith this and other hereiu-disclosed ob-.

iects in View it consists of the constructions, combinations, and arrangements of 'parts hereinafter described and claimed.

Inthe herewith accompanying drawings, Figure 1 is a central vertical section ei' that portion of said drill Which discleses my in- Vention. Fig. 2 is a side elevatien of the drilloint forming .part of said. invention, and `ig. 3 is a section through said drill and drill-point on the line A B of Fig. i

In thedrawings, 1 is a tuhulur drill-rod of any desired length, upon the lower end ot which is secured asleeve or housing oi' con-- siderably greater diameter than said drill-red which thsleaves a reserveir eg 3 between said rod and said sleeve. The L eeve preferabl depends below the plane ei' the lower en of said rod and niey be *rural at its uper end to the rod in any suitable manner; ut I preferably secure it by ron* ting the u per end ol' the sleeve and sbrinhung it on. he lo wer end of the rod is threaded to enage the threaded reduced upper end oi" the ilrill-point i, Which point tu bular and is enlarged in diameter at its low& end, as at 4?, and 'is preferably reduced. in diameter at its upper end, at 4 E ;id point has formed therein a series of interior groo'ves or channels 5, extending from its lower end a short distance upward. Th greeven preferably connect at the lower end el" the drili oint with exterior grnovee er channels fi tormed in said drill-point and mz' ward, preferably in a course amir like the grooves of a screw. Ummi* said interior grooves and ez through said enlarged portion oi:

ollowing 'same time Water is fed into said and mi the drill rod or point to said reservoir *for the i purpose of washing; said abrasives down into said passagee 6. l desired, a suitable nuniber of VGI'l' eal s acmgqvebs 8 may be forma-nl. on said driil-ro to space the outer side walls of said reservoir apart therefroin, so that said Wall Will not be a to collapse in the event that a pipe-meneh` were applied to it 'when it is desired to disconneet said drill-point. If desired, sniall ports may be formed 111 the upper end of said reservoir, as at 9, to prevent the formation of a vacuum therein.

In operatiensaid reservoir is 'first approximately filled with loose abrasiv'es of any suitable naturesuch as sand, einery, corundum, shot, carborundum, or otherwise a sectiun of the drill rod being inverted for such purpose, and` the (hill-point is then secured .in place and the implement is then lowered into the b'ore in the rock. Any suit bie rotating means (not shown) is connect to said drillrod, and said drill is rotated th iy. .At the drill-rod at its upper end from any suitable source and in any suitable manner, (not shown) preferably under ressure, and descends to and escayen from t e bottom. of the drill, passing on its way down through said passe/gee 1"! and la' and said. groove 5 and washing d own a supply of said abrasiv is from said reseri oir. ?Said Water then flows upWard on, the outside oi? the eidarged portion of the drill thru ***h said grooves 5 carrying with it the ni or grindings from the rock and the spent and lighter particles 'of said ab, Uut of the up )er ends of said grooves ::n said Water llings flow upward between the outer Wall of the res'ervoir or rod and the Wall of the rock till they reach the surface and are eonducted away from the hole by any suitable means or in any suitable manner. It will be observed that the central Vertical passage of said drill is ada ted to receive a core cut iron 1 the rock by the ower end and the inelosing Wall ,of said passage in connection or coperatitm with said abrasives and that said passage is of greater diameter in iis upper end than in its lower end. Th the Wall or said drill only contacts with said Core for a short part of its length and excessive friction illlSH-*Wltll is obviatcd. ltwill be observed, also, that the part i* of said point is of slightly-greater di amotcr than said resm'voir.` Thus said reservoir and drill-rod are given clearance from the Wall of' rock, thereby avoiding 'l'riotion and ailording an outside passege for the up- Ward flow of the Water. The following edges or walls of the groovcs are beveled, as at 5 Fig. 3, to permit ahrasives to become Wedged between the side of said point and the surrounding rock to smooth or ahraid the wall of the rock and slightly enlarge the hore. The grooves 5 are formed in similar manner. It is obvious that my invention may, how ever, be modified in minor partioulars with in the spirit and scope of my said invention. I do not, therefore', desire to he linnted to the exact arrangement of all parts as shown and described.

Having described niy invention, what I claim, and desire to secure by Letters ?steng is* 1. In a` drill, the combination of a tubular drill-rod, a. reservoir formed on and around said rod at its lower end, a tuhular drill-point secured to the lower end of said rod, and having passages formed therein connecting the central passage said driil-point with said reservoir.

In a drill, the combination oi a tub'ular drill-rod, a reservoir mounted on said rod at its lower end, tulnilar drill-pointseenred to the lower 0nd of said drill-rod and forming an approxiniate closure l o' said reservoir and' having passagcs formed in its Wall connecting central passage with said reservoir and having other passages formed in its Wall connecting said reservoir with said central pasat a plane below the first said wall passages, said drill--point being enlarged in eX- tcrnal diameter and reduced in internal diameter at its lower end, said drill-point having a. series of interior and exterior grooves formed in said lower end', substantially as described.

3. The combination oi a tubular drill-rod, a bit carried thereby, :t reservoir for loose abrasive carried by said rod and communicating with the central passageof said rod and hit, the construction hein such that a supply of loose abrasives may low from said resorvoir to the central passage of said bit.

l. A drill-rod provided with an ahrasivestoring reserv oir, and a drill oint removably secured to said rod and forming part of the inclosing wall of said reservoir and provided with passa'ges adapted to conduct Water from said drill-rod to said reservoir and with other passages adapted to conduct Water and loose abrasives from said reservoir to the lower end of said point.

5. A tnlgnlar drill-rod, a tu'buiar drill point or bit engaging said 'iniii-rod, a housing bar ried by said drill-rod and surrounding the lower end of said drill-rod and the upper end of said bit and in eonnection therewithforming a reservoir for the storage of loose abra-`` S1V(-`S.

In testiinony whereof I hereunto affix my signature in presence of two witnesses.

WILLIAM BESSON; Vl itnesses: i

JAMES T. WArsoN, W. H. SMALLWOOD. 

